South African Sprinter Says He Never Snapped at His Girlfriend

PRETORIA—A South African prosecutor, in a hard-hitting cross-examination, used crime-scene photos on Thursday to suggest Oscar Pistorius was lying about what happened when he shot and killed his girlfriend on Valentine's Day last year.

In a fourth day of testimony, Mr. Pistorius was taken through an exhaustive reconstruction of the hours before he shot Reeva Steenkamp through a locked bathroom door. Mr. Pistorius had said he woke earlier the night of the shooting to pull two electric fans off his balcony. He said later,...